Enabling the old style FreePBX dial patterns not working in RasPBX with FreePBX 13?

I tried installing RasPBX on a Raspberry Pi, it is running FreePBX and Asterisk 13.11.2. If under Advanced Settings-GUI Behavior I set “Enable The Old Style FreePBX Dial Patterns Textarea” to Yes then what I find is that anything I enter in the textarea on an outbound route is not saved, and if there are already some patterns there because I’ve imported some from a CSV file, and I try to make any changes then all the changes and the existing patterns are lost, and the textarea is left empty after I click Submit. Has anyone else noticed this behavior?